Technics SX-PX552

8BIT MICROCOMPUTER
IC1
DATA ,S C K
IC2,3
BUFFER LED DRIVE
VR2
MAIN
VOLUME
SEG0 SEG11 CM0 CM5 SW0 SW7
256K BIT
PSEUDO
STATIC
RAM
D-A
CONVERTER
IC11
IC21 IC26A
IC26B
D0 D7
A0 A14
64M BIT
MASK RAM
IC12
D0 D15
A0 A19
Q2 6
LED1
Q6
Q7,8
+5D REGULATOR
+5A REGULATOR
+3.3V REGULATOR
Q9
SWITCHES & LEDS SWITCHES & LEDS
LED DISPLAY
-15V
CPL
C
CPR
D
MAIN
A
CN3
CN1
CN2
CN4
CN2 CN3
CN1
CN6
+15V
D12
D13
D14
+5A
+5B
+5D
+VCC
+3.3V
WD0A WD15A
RD0A RD7A
WA0A WA19A
RA0A RA14A